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Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory
Large Square Sauna No. 40 – Natural (With Window) | Thermory

The Thermory Square Sauna No. 40 is a professional-grade 4-person outdoor sauna meticulously engineered for architectural luxury and long-term durability. Constructed from thermally modified Nordic spruce, this model is the ideal solution for homeowners seeking exceptional rot resistance and a spacious interior with seven feet of vertical headroom for maximum comfort. Its expansive full-front tempered glass and signature wide back window invite natural light and panoramic views while maintaining superior heat retention through 1.57-inch thick boards and a sturdy, weather-resistant build. By combining a modern square-barrel aesthetic with deep ergonomic benches and an included all-weather rain jacket, the Square Sauna No. 40 delivers the industry-standard balance of contemporary design, high-performance insulation, and authentic Finnish-style wellness for any premium outdoor retreat.

  • 4-Person Capacity – Spacious interior with seven feet of headroom and deep benches provides comfortable seating and reclining, ideal for private or shared sauna sessions.
  • Thermally Modified Nordic Spruce – Durable, rot-resistant wood with a smooth, cool-to-the-touch surface ensures long-lasting performance, superior comfort, and minimal maintenance.
  • Panoramic Views – Full-front tempered glass and wide back window invite natural light and offer expansive views, enhancing relaxation and creating a serene, visually appealing atmosphere.
  • Superior Heat Retention – Thick boards and robust construction optimize insulation, ensuring consistent warmth, energy efficiency, and quiet operation for a soothing sauna experience.
  • All-Weather Protection – Includes a protective rain jacket, providing year-round outdoor durability and safeguarding the sauna from the elements.
  • Ergonomic Bench Design – Deep back and side benches accommodate sitting or reclining, maximizing comfort during extended sauna sessions.
  • MPN: Not Specified
  • Compatibility: Residential / Outdoor Sauna
  • Part Type: Square Sauna
  • What’s Included: Sauna unit, Rain jacket
  • Capacity: 4 persons
  • Dimensions: Length 8.24′ × Width 6.90′ × Height 7.21′
  • Volume: 241 cu. ft.
  • Bench Dimensions: Back bench 6.5′ × 1.61′, Side bench 4.30′ × 1.61′
  • Window Size: 6.3′ × 3.2′
  • Board Thickness: 1.57″
  • Heater: 11KW
  • Material: Thermally modified Nordic spruce
  • Special Features: Full-front tempered glass, wide back window, panoramic views, seven feet headroom, deep ergonomic benches, superior heat retention, all-weather protection with included rain jacket, smooth and cool-to-the-touch surfaces
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Large Square Sauna No. 40 – Natural (With Window) | Thermory

by Thermory
SKU: THR-No40
$9,907.00
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The Thermory Square Sauna No. 40 is a professional-grade 4-person outdoor sauna meticulously engineered for architectural luxury and long-term durability. Constructed from thermally modified Nordic spruce, this model is the ideal solution for homeowners seeking exceptional rot resistance and a spacious interior with seven feet of vertical headroom for maximum comfort. Its expansive full-front tempered glass and signature wide back window invite natural light and panoramic views while maintaining superior heat retention through 1.57-inch thick boards and a sturdy, weather-resistant build. By combining a modern square-barrel aesthetic with deep ergonomic benches and an included all-weather rain jacket, the Square Sauna No. 40 delivers the industry-standard balance of contemporary design, high-performance insulation, and authentic Finnish-style wellness for any premium outdoor retreat.

  • 4-Person Capacity – Spacious interior with seven feet of headroom and deep benches provides comfortable seating and reclining, ideal for private or shared sauna sessions.
  • Thermally Modified Nordic Spruce – Durable, rot-resistant wood with a smooth, cool-to-the-touch surface ensures long-lasting performance, superior comfort, and minimal maintenance.
  • Panoramic Views – Full-front tempered glass and wide back window invite natural light and offer expansive views, enhancing relaxation and creating a serene, visually appealing atmosphere.
  • Superior Heat Retention – Thick boards and robust construction optimize insulation, ensuring consistent warmth, energy efficiency, and quiet operation for a soothing sauna experience.
  • All-Weather Protection – Includes a protective rain jacket, providing year-round outdoor durability and safeguarding the sauna from the elements.
  • Ergonomic Bench Design – Deep back and side benches accommodate sitting or reclining, maximizing comfort during extended sauna sessions.
  • MPN: Not Specified
  • Compatibility: Residential / Outdoor Sauna
  • Part Type: Square Sauna
  • What’s Included: Sauna unit, Rain jacket
  • Capacity: 4 persons
  • Dimensions: Length 8.24′ × Width 6.90′ × Height 7.21′
  • Volume: 241 cu. ft.
  • Bench Dimensions: Back bench 6.5′ × 1.61′, Side bench 4.30′ × 1.61′
  • Window Size: 6.3′ × 3.2′
  • Board Thickness: 1.57″
  • Heater: 11KW
  • Material: Thermally modified Nordic spruce
  • Special Features: Full-front tempered glass, wide back window, panoramic views, seven feet headroom, deep ergonomic benches, superior heat retention, all-weather protection with included rain jacket, smooth and cool-to-the-touch surfaces
Video poster Play video 1
Open product video in larger window